CN104975896A - Natural gas pipeline network pressure energy self-control power generation system and self-control method - Google Patents
Natural gas pipeline network pressure energy self-control power generation system and self-control method Download PDFInfo
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Abstract
The invention provides a natural gas pipeline network pressure energy self-control power generation system which comprises a power generation system, a self-control system and a power output system, wherein the power generation system, the self-control system and the power output system are located on a branch pipeline of a natural gas pipeline network. The power generation system comprises expansion equipment, a power generator and a temperature and pressure balancing device, wherein the expansion equipment, the power generator and the temperature and pressure balancing device are located on the branch pipeline. A power output shaft of the expansion equipment drives the power generator to generate power, and the power generator is connected with the power output system. The self-control system comprises a first electromagnetic valve, a first pressure meter, a second electromagnetic valve, a second pressure meter and a thermometer. The first electromagnetic valve and the second electromagnetic valve are connected. The self-control system further comprises a PLC. The first electromagnetic valve, the first pressure meter, the second electromagnetic valve, the second pressure meter and the thermometer are all connected with the PLC. According to the natural gas pipeline network pressure energy self-control power generation system, the technology that power storage, inversion, self-control and flow limiting are combined is adopted, and power supply is controlled to be stable, so that the problem that power output is not stable due to large fluctuation of gas is solved; the whole process is high in stability and good in safety and can be continuously operated.
Description
Technical field
The present invention relates to a kind of power generating equipment, be specifically related to robot control system(RCS) that one utilizes the kinetic energy in fluid line (such as gas distributing system, Liquid tube net) to carry out generating electricity and controlling method.
Background technique
Carry out in the process of carrying at fluid line at present, due to monitoring, control gear is in remote districts, away from electrical network, monitoring can be caused like this, equipment shorts of electricity such as detection or without electricity supply, there is hidden danger, a lot of voltage regulating stations such as, are had to be in short of electricity because of remote location in natural gas transport process or without electric supply status, cause power supply difficulty, these voltage regulating station/casees due to geographical position comparatively remote, frequent appearance due to mains-supplied cable supply too late, so that station illumination and winter accompany the required electricity needs such as heat to be not being met, simultaneously due to not outer power supply, supervisory system is caused to install and use, data cannot realize remote monitoring, need every day and send tour personnel site inspection, the uncertain potential safety hazard of pipe network equipment can not the problem such as Timeliness coverage also manifest thereupon.
For these voltage regulating station electrical problems current, technician is had to propose a kind of energy collection type pipeline fluid (flowing water, wind) electricity generating device, the energy of fluid (flowing water, wind) is fully collected by horn-like energy collecting pipeline, then be electric energy by generator by fluid power conversion, but operationally there is potential safety hazard in this electricity generating device, revealing easily appears in such as pipeline, hydrodynamic pressure is unstable, detect maintenance by manpower merely to waste time and energy, and reaction of pinpointing the problems and deal with problems is slow.
Summary of the invention
The goal of the invention of the application is to solve current above-mentioned technical problem, and provides a kind of safe and reliable, natural gas pipe network pressure energy automatic control power generation system of monitoring constantly and method.
In order to complete the goal of the invention of the application, the application by the following technical solutions:
Natural gas pipe network pressure energy automatic control power generation system of the present invention, comprise the power generation system be positioned in gas distributing system bypass line, robot control system(RCS) and electric power output system, described power generation system comprises the bloating plant be positioned in described bypass line, generator and temperature and pressure balace weight, the outlet port of described bloating plant arranges described temperature and pressure balace weight, the pto＝power take-off of described bloating plant drives electrical power generators, described generator is connected with electric power output system, described robot control system(RCS) comprises the second solenoid valve being positioned at the first solenoid valve on described bloating plant upstream branch pipeline and the first pressure meter and being positioned on described temperature and pressure balace weight downstream leg pipeline, second pressure meter and thermometer, described first solenoid valve and the second solenoid valve are connected, described robot control system(RCS) also comprises PLC, described first solenoid valve, first pressure meter, second solenoid valve, second pressure meter and thermometer are connected with described PLC respectively, described electric power output system has electric quantity monitor, described first solenoid valve upstream branch pipeline is provided with pneumatic valve and restrictor, described pneumatic valve and electric quantity monitor are connected with described PLC respectively.
Bloating plant of the present invention is fluid motor, and described fluid motor is connected with rotational speed detector, and rotational speed detector is connected with PLC.
First solenoid valve upstream branch pipeline of the present invention is provided with filter and flowmeter, and described second solenoid valve downstream leg pipeline is provided with pressure governor and gas concentration detector, and described gas concentration detector is connected with PLC.
Electric power output system of the present invention comprises electric closet and voltage stabilizer, the power output end of described generator is connected with electric closet, described electric closet separates 380V Ac and 220V direct current two circuit after voltage stabilizer voltage stabilizing, and wherein 220V direct current is through electric accumulator, inverter and frequency stabilizer supply consumer.
Electric accumulator of the present invention installs described electric quantity monitor, and described voltage stabilizer is three-phase voltage voltage stabilizer.
The present invention also provides a kind of natural gas pipe network pressure energy generating automatic control method, uses above-mentioned natural gas pipe network pressure energy automatic control power generation system, comprises following automatic control method:
1) when the first pressure meter monitors bypass line internal fluid pressure >1.1MPa, electrical signal is fed back to PLC by the first pressure meter, and PLC controls the first closed electromagnetic valve whole system; When the second pressure meter monitors bypass line internal fluid pressure >0.13MPa, the second pressure meter is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system; When thermometer monitors bypass line internal flow temperature <-20 DEG C, thermometer is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system; As rotational speed detector monitoring fluid motor rotary speed >1500r/min, rotational speed detector is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system; When gas concentration detector monitors bypass line internal flow concentration >2%vol, gas concentration detector is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system;
2) when described quantity of electricity controller monitors the electricity >98% of electric accumulator, quantity of electricity controller by signal feed back to PLC, PLC controls pneumatic valve and reduces the flow in bypass line until close whole system, when described quantity of electricity controller monitors the electricity <15% of electric accumulator, PLC controls the flow in pneumatic valve increase bypass line.
The present invention is at described automatic control method 1) in when the first closed electromagnetic valve time the first solenoid valve can by Signal transmissions give the second solenoid valve, the second solenoid valve responds the signal chain cut out downstream leg pipeline of the first solenoid valve.
Natural gas pipe network pressure energy automatic control power generation system of the present invention is compared with prior art distinguished and is: natural gas pipe network pressure energy automatic control power generation system of the present invention comprises the power generation system be positioned in gas distributing system bypass line, robot control system(RCS) and electric power output system, adopt the technology that electric power storage, inversion, automatic control, current limliting etc. combine, control electricity supply and demand is stablized, solve the electric power caused greatly because of combustion gas wave properties and export the problems such as unstable, whole technology stability is strong, Security good, sustainable operation.From the angle of system support, consider emphatically Systematical control, simple and safety three aspects, integrate domestic superior resources, the design and manufaction of system layout's miniaturization, skid, production domesticization is realized at limited space (voltage regulating station/cabinet/case), meet most of high pressure website need for electricity, not only can solve company's pressure regulation website ubiquitous without problems such as electricity/few electricity, and can popularize in an all-round way.
Natural gas pipe network pressure energy automatic control power generation system of the present invention has the following advantages:
(1) this automatic control power generation system is not being sacrificed under the prerequisite that rock gas and affect normally runs rock gas station, the pressure energy effectively in recovery natural gas pressure regulating process;
(2) first solenoid valves and the second solenoid valve have dual chain cutting function, make system cloud gray model more safe and reliable;
(3) power storage system has automatic control function, can feed back to pneumatic valve according to power storage system electricity memory space, controls the flow of rock gas;
(4) whole system technique has miniaturization, skid feature;
(5) adopt the slow-speed of revolution, high pulling torque, fluid motor without oily anhydrous systems, therefore whole system noise is little.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of natural gas pipe network pressure energy automatic control power generation system of the present invention.
Embodiment
As described in Figure 1, the natural gas pipe network pressure energy automatic control power generation system of the present embodiment, comprise the power generation system, robot control system(RCS) and the electric power output system that are positioned in gas distributing system bypass line 2 (namely picking out bypass line 2 on gas distributing system main pipeline 1), power generation system comprises the bloating plant 31 be positioned in bypass line 2, generator 32 and temperature and pressure balace weight 6, the outlet port of bloating plant 31 arranges temperature and pressure balace weight 6, the Power output axle driven dynamo 32 of bloating plant 31 generates electricity, and generator 32 is connected with electric power output system.Improvement of the present invention is robot control system(RCS), controls generated energy and improve stability and the Security of system by robot control system(RCS).
Particularly, robot control system(RCS) comprises the second solenoid valve 43 being positioned at the first solenoid valve 41 on bloating plant 31 upstream branch pipeline 2 and the first pressure meter 42 and being positioned on temperature and pressure balace weight 6 downstream leg pipeline 2, second pressure meter 44 and thermometer 46, first solenoid valve 41 and the second solenoid valve 43 are connected, between such first solenoid valve 41 and the second solenoid valve 43, there is chain reaction, namely can send a signal to the second solenoid valve 43 when the first solenoid valve 41 cuts out simultaneously, second solenoid valve 43 responds the signal also shutdown system of the first solenoid valve 41, two solenoid valves cut out whole system simultaneously, Security is higher.
This robot control system(RCS) also comprises PLC (not shown), first solenoid valve 41, first pressure meter 42, second solenoid valve 43, second pressure meter 44 is connected with PLC (not shown) respectively with thermometer 46, PLC (not shown) judges the Security of system according to the monitor data of the warning value preset and the pressure meter obtained constantly and thermometer 46, when monitor data exceeds warning value, PLC (not shown) can close whole system rapidly by Controlling solenoid valve, guarantees security of system.
In order to improve the stability that whole system is powered, electric power output system has electric accumulator 51 and electric quantity monitor (not shown), first solenoid valve 41 upstream branch pipeline 2 is provided with pneumatic valve 45 and restrictor, and pneumatic valve 45 is connected with PLC (not shown) respectively with electric quantity monitor (not shown).Electric quantity monitor (not shown) can monitor the electricity that whole system stores, when system power supply amount is sufficient and electric accumulator 51 electricity of electric power output system is sufficient, PLC (not shown) can control to reduce the fluid flow in bypass line 2 by pneumatic valve 45, thus minimizing generated energy, when system power supply amount is too low, PLC (not shown) can control to increase the fluid flow in bypass line 2 by pneumatic valve 45, to ensure that system power supply amount is sufficient.Electric power output system comprises electric closet 53 and voltage stabilizer 54, the power output end of generator 32 is connected with electric closet 53, electric closet 53 separates 380V Ac and 220V direct current two circuit after voltage stabilizer 54 (voltage stabilizer 54 is preferably three-phase voltage voltage stabilizer 54) voltage stabilizing, and wherein 220V direct current supplies consumer through electric accumulator 51, inverter 55 and frequency stabilizer 56.
The bloating plant 31 of the present embodiment is screw expander, turbo-expander or fluid motor, be preferably fluid motor, fluid motor is connected with rotational speed detector 7, rotational speed detector 7 is connected with PLC (not shown), and when fluid motor rotating speed exceedes warning value, PLC (not shown) can by solenoid valve shuts whole system.
In the present embodiment, the first solenoid valve 41 upstream branch pipeline 2 is also provided with filter and flowmeter, second solenoid valve 43 downstream leg pipeline 2 is provided with pressure governor and gas concentration detector, and gas concentration detector is connected with PLC (not shown).
The present embodiment also provides a kind of natural gas pipe network pressure energy generating automatic control method, uses above-mentioned natural gas pipe network pressure energy automatic control power generation system, comprises following automatic control method:
1) when the first pressure meter 42 monitors bypass line 2 internal fluid pressure >1.1MPa, electrical signal is fed back to PLC (not shown) by the first pressure meter 42, and PLC (not shown) controls the first solenoid valve 41 and closes whole system; When the second pressure meter 44 monitors bypass line 2 internal fluid pressure >0.13MPa, second pressure meter 44 is by signal feed back to PLC (not shown), and PLC (not shown) controls the first solenoid valve 41 and closes whole system; When thermometer 46 monitors bypass line 2 internal flow temperature <-20 DEG C, thermometer 46 is by signal feed back to PLC (not shown), and PLC (not shown) controls the first solenoid valve 41 and closes whole system; As rotational speed detector monitoring fluid motor rotary speed >1500r/min, rotational speed detector is by signal feed back to PLC (not shown), and PLC (not shown) controls the first solenoid valve 41 and closes whole system; When gas concentration detector monitors bypass line 2 internal flow concentration >2%vol, gas concentration detector is by signal feed back to PLC (not shown), and PLC (not shown) controls the first solenoid valve 41 and closes whole system;
2) when quantity of electricity controller monitors the electricity >98% of electric accumulator 51, quantity of electricity controller by signal feed back to PLC (not shown), PLC (not shown) controls pneumatic valve 45 and reduces the flow in bypass line 2 until close whole system, when quantity of electricity controller monitors the electricity <15% of electric accumulator 51, PLC (not shown) control pneumatic valve 45 increases the flow in bypass line 2.
At automatic control method 1) in when the first closed electromagnetic valve the first solenoid valve can by Signal transmissions give the second solenoid valve, the second solenoid valve responds the signal chain cut out downstream leg pipeline of the first solenoid valve.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention is see claim, and when without prejudice to spirit of the present invention, the present invention can do any type of amendment.
Claims (7)
1. a natural gas pipe network pressure energy automatic control power generation system, comprise the power generation system be positioned in gas distributing system bypass line, robot control system(RCS) and electric power output system, described power generation system comprises the bloating plant be positioned in described bypass line, generator and temperature and pressure balace weight, the outlet port of described bloating plant arranges described temperature and pressure balace weight, the pto＝power take-off of described bloating plant drives electrical power generators, described generator is connected with electric power output system, it is characterized in that: described robot control system(RCS) comprises the second solenoid valve being positioned at the first solenoid valve on described bloating plant upstream branch pipeline and the first pressure meter and being positioned on described temperature and pressure balace weight downstream leg pipeline, second pressure meter and thermometer, described first solenoid valve and the second solenoid valve are connected, described robot control system(RCS) also comprises PLC, described first solenoid valve, first pressure meter, second solenoid valve, second pressure meter and thermometer are connected with described PLC respectively, described electric power output system has electric quantity monitor, described first solenoid valve upstream branch pipeline is provided with pneumatic valve and restrictor, described pneumatic valve and electric quantity monitor are connected with described PLC respectively.
2. natural gas pipe network pressure energy automatic control power generation system according to claim 1, is characterized in that: described bloating plant is fluid motor, and described fluid motor is connected with rotational speed detector, and rotational speed detector is connected with PLC.
3. natural gas pipe network pressure energy automatic control power generation system according to claim 2, it is characterized in that: described first solenoid valve upstream branch pipeline is provided with filter and flowmeter, described second solenoid valve downstream leg pipeline is provided with pressure governor and gas concentration detector, and described gas concentration detector is connected with PLC.
4. natural gas pipe network pressure energy automatic control power generation system according to claim 3, it is characterized in that: described electric power output system comprises electric closet and voltage stabilizer, the power output end of described generator is connected with electric closet, described electric closet separates 380V Ac and 220V direct current two circuit after voltage stabilizer voltage stabilizing, and wherein 220V direct current is through electric accumulator, inverter and frequency stabilizer supply consumer.
5. natural gas pipe network pressure energy automatic control power generation system according to claim 4, is characterized in that: described electric accumulator installs described electric quantity monitor, and described voltage stabilizer is three-phase voltage voltage stabilizer.
6. a natural gas pipe network pressure energy generating automatic control method, uses the natural gas pipe network pressure energy automatic control power generation system as described in claim 4 or 5, it is characterized in that: comprise following automatic control method:
1) when the first pressure meter monitors bypass line internal fluid pressure >1.1MPa, electrical signal is fed back to PLC by the first pressure meter, and PLC controls the first closed electromagnetic valve whole system; When the second pressure meter monitors bypass line internal fluid pressure >0.13MPa, the second pressure meter is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system; When thermometer monitors bypass line internal flow temperature <-20 DEG C, thermometer is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system; As rotational speed detector monitoring fluid motor rotary speed >1500r/min, rotational speed detector is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system; When gas concentration detector monitors bypass line internal flow concentration >2%vol, gas concentration detector is by signal feed back to PLC, and PLC controls the first closed electromagnetic valve whole system;
2) when described quantity of electricity controller monitors the electricity >98% of electric accumulator, quantity of electricity controller by signal feed back to PLC, PLC controls pneumatic valve and reduces the flow in bypass line until close whole system, when described quantity of electricity controller monitors the electricity <15% of electric accumulator, PLC controls the flow in pneumatic valve increase bypass line.
7. natural gas pipe network pressure energy generating automatic control method according to claim 6, it is characterized in that: at described automatic control method 1) in when the first closed electromagnetic valve time the first solenoid valve can by Signal transmissions give the second solenoid valve, the second solenoid valve responds the signal chain cut out downstream leg pipeline of the first solenoid valve.
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| CN105401990A (en) * | 2015-11-23 | 2016-03-16 | 北京建筑大学 | Natural gas pressure energy power generation pressure regulating device and method |
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| CN105953074A (en) * | 2016-04-27 | 2016-09-21 | 北京市燃气集团有限责任公司 | Intelligent power generation and pressure regulation box for natural gas pipeline network |
| CN106523920A (en) * | 2016-12-01 | 2017-03-22 | 深圳市燃气集团股份有限公司 | Pipe network pressure energy method and device utilizing turbo-expander |
| CN107906367A (en) * | 2017-11-27 | 2018-04-13 | 北京市燃气集团有限责任公司 | A kind of mini gas pipe network pressure regulation power generator |
| CN108204245A (en) * | 2018-01-23 | 2018-06-26 | 深圳市燃气集团股份有限公司 | A kind of gas distributing system pressure recovery method and device |
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| CN108413251A (en) * | 2018-02-07 | 2018-08-17 | 广州莱仑特种装备有限公司 | A kind of self feed back denoising device for pipe network natural gas pressure regulating |
| CN110146753A (en) * | 2019-05-08 | 2019-08-20 | 华南理工大学 | A kind of small miniature pressure energy of natural gas power generation test platform |
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| CN106523920B (en) * | 2016-12-01 | 2019-04-09 | 深圳市燃气集团股份有限公司 | A kind of pipe network pressure energy method and device using turbo-expander |
| CN108253296A (en) * | 2016-12-28 | 2018-07-06 | 邹青辰 | A kind of compressed natural gas release device and the method using pressure potential power generation |
| CN107906367A (en) * | 2017-11-27 | 2018-04-13 | 北京市燃气集团有限责任公司 | A kind of mini gas pipe network pressure regulation power generator |
| CN108204245A (en) * | 2018-01-23 | 2018-06-26 | 深圳市燃气集团股份有限公司 | A kind of gas distributing system pressure recovery method and device |
| CN108413251A (en) * | 2018-02-07 | 2018-08-17 | 广州莱仑特种装备有限公司 | A kind of self feed back denoising device for pipe network natural gas pressure regulating |
| CN110146753A (en) * | 2019-05-08 | 2019-08-20 | 华南理工大学 | A kind of small miniature pressure energy of natural gas power generation test platform |
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Application publication date: 20151014 |